粉末近净成形(Powder metallurgy near net shaping,PM-NNS)技术能够制备出具有优异综合力学性能的粉末合金复杂部件.介绍了粉末热等静压(Hot isostatic pressing,HIP)近净成形技术原理及优势,综述了近年来国内外粉末近净成形在航天发动机领域的研究现状,从工艺路线和构件研制两方面展开,简述了构件制备过程的影响因素及缺陷控制,结合中国科学院金属研究所粉末近净成形技术在航天发动机领域的研究及应用情况,总结了粉末近净成形技术当前存在的主要问题及发展方向,以期进一步拓宽该技术的应用范围.
Application of Powder Metallurgy Near Net Shaping in Aerospace Engines
Powder metallurgy near net shaping(PM-NNS)technology can prepare complex PM components with excellent comprehensive mechanical properties.The principle and advantages of hot isostatic pressing are introduced.The research status of PM-NNS technology in aerospace engines at home and abroad is reviewed.The influencing factors and defect control of the component preparation process are briefly described from the aspects of process route and component development.Some research work and application of PM-NNS in aerospace engine by Institute of Metal Research,Chinese Academy of Sciences are reported.Finally,the main problems and development directions of PM-NNS were summarized,in order to further expand the application of this technology.
Near net shapingHot isostatic pressingAerospace enginesThermal induced poresPrior particle boundaries
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